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Briquette roll round: the material is gray cast iron, the traditional heat treatment deformation, easy to crack, the original heat treatment after cold working, service life is very low. Using laser surface melting treatment, the hardness is greatly improved, longer life. Figure 3 Synchronous powder feeding schematic diagram 7.1. Laser cladding materials. The laser cladding materials are mainly thermal spray type of material, such as self-fluxing alloys, metal + ceramic composites, ceramic materials and nano materials. (1) self-fluxing alloy powder: The main iron-based self-fluxing alloy, nickel-based self-fluxing alloy of gold and cobalt base self-fluxing payment. This kind ofchina laser pointerhas been put into the practice.
Laser surface alloying metal surface with a laser beam and plus alloying elements melt mixed together, the rapid solidification in the original substrate surface to form a new alloy layer. Laser alloying the substrate: carbon steel, alloy steel, high-speed steel, cast iron. The main alloying elements: Cr, Ni, W, Mo, Ti, Mn, B, and V, Co. Application examples due to the presence of cracks, spalling and other issues, at a research stage. Nano-materials or nano-composite materials: such as nano WC / Ni-based self-fluxing. Different cladding Dry Friction and Wear Test results (volume wear amount mm3) [5] different cladding materials dry friction and sliding wear test results are shown in Table 2. The single beam ofchina laser pointeris as powerful as it should be.
A factory stamping dies, the material provisions of 45 steel, processing and found that after the is Q2352A steel, the original process of flame hardening, the hardness fail to meet requirements of the Q2352A steel flame hardening, laser surface alloying, the surface micro-melting and increase carbon increasing chromium surface hardness> 450 the HV layer depth> 4 mm, to meet the requirements. Add a cladding material in the surface of the substrate material (using the preset method or synchronized method), the use of high-energy density laser beam so that the substrate surface thin test results [6], nickel-based self-fluxing alloy + WC clad layer of dry friction sliding wear tests The results in Table 3. Nickel-based self-fluxing alloy + WC clad layer rubber wheels slurry wear layer fused together, its was metallurgy Tim materials cladding layer formed on the substrate surface, as shown in Figure 3. The single beam of green laser pointer is very bright.
Mining slurry pump balance disc: mine-water corrosion and water erosion wear of the coal particles and the interaction of alloy steel or alloy cast iron is generally low, service life, later renamed the flame spray Ni-based alloys, parts life has improved, but the process operation is complex alloy powder consumption, deformation of the workpiece, coating defects, large parts machining. 45 steel by laser cladding Ni60 and of Ni60 + WC coating for use by the mine site, the life of flame spray Ni-base alloy coating increased by 50%, and of good quality, high efficiency [8]. (2) laser cladding pick: cladding material, Ni-based self-fluxing alloy + WC. The customers can choose the laser pattern ofchina laser pointerthey like.
Mine 108 t dump truck engine camshaft repair, cladding materials, Ni-based self-fluxing. 8 laser shock hardening Figure 4 tungsten carbide content of Ni60 alloy wear rate (108 to 1 011 W / cm2), high power density laser beam within a very short pulse duration (10 - 3 10 - 9 s), irradiating the metal surface, it quickly vaporized, momentum pulses generated during the surface atoms escape and form a shock wave or stress wave on the metal surface, on and on plastic strain, thus changing the structure and dynamics of the microstructure of the metal surface mechanical performance, increase strength, hardness and fatigue limit of the material. At present, mainly in the research stage of exploration. The new production line enhance the productivity of china laser pointer.